84609889664 has 16 divisors (see below), whose sum is σ = 168558764820. Its totient is φ = 42304944768.

The previous prime is 84609889643. The next prime is 84609889667. The reversal of 84609889664 is 46698890648.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 84609889594 and 84609889603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84609889667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330507254 + ... + 330507509.

Almost surely, 2^84609889664 is an apocalyptic number.

It is an amenable number.

84609889664 is a deficient number, since it is larger than the sum of its proper divisors (83948875156).

84609889664 is an equidigital number, since it uses as much as digits as its factorization.

84609889664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661014777 (or 661014765 counting only the distinct ones).

The product of its (nonzero) digits is 143327232, while the sum is 68.

The spelling of 84609889664 in words is "eighty-four billion, six hundred nine million, eight hundred eighty-nine thousand, six hundred sixty-four".